x-4=(x-4)^2,(x-4)^2-(x-4)=0,(x-4)(x-4-1)=0,x=4或x=5
(5x-1)(2x+4)=3x+6
10x²+20x-2x-4-3x-6=0
10x²+15x-10=0
2x²+3x-2=0
(2x-1)(x+2)=0
x=1/2或x=-2
x^2+5=2根号5x
x^2-2根号5x+5=0
(x-根号5)²=0
x=根号5
祝你开心
x-4=(x-4)^2,(x-4)^2-(x-4)=0,(x-4)(x-4-1)=0,x=4或x=5
(5x-1)(2x+4)=3x+6
10x²+20x-2x-4-3x-6=0
10x²+15x-10=0
2x²+3x-2=0
(2x-1)(x+2)=0
x=1/2或x=-2
x^2+5=2根号5x
x^2-2根号5x+5=0
(x-根号5)²=0
x=根号5
祝你开心